George w



G. W. LINDSAY.

OIL BURNER.

APPLICATION FILED SEPT-23,1918.

Patented Oct. 7, 1919.

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x En STATES PA'rEN'r orrion.

GEORGE W. LINDSAY, 01? DENVER, COLORADO, ASSIGNOR TO THE DENVER FIRE CLAY COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELAWARE.

OIL-BURNER.

Specification of Letters Patent.

Application filed September 23, 1918. Serial No 255,327.

To all whom it may concern Be it known that I, GEORGE W. LINDSAY,

. a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Oil-Burners; and I do declare the following to be a full, clear,

and exact description of the invention, such as will enable. others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to burners and particularly to those for atomizing oil and burning the same in furnaces, and is an improvement over that disclosed in Patent No. 1,257,896, issued to me February 26, 1918.

atomization of the oil and to accurately control the air supply without pressure variation.

"Briefly, the invention comprises a nozzle on a casing within which the atomizing elements are chiefly located. These elements include a hollow frusto-conical member having blades therein inclined somewhat from the axis of the cone to impart a gymtory, motion to the air, this cone bein reciprocable to control the air supply. lVithin the cone a flared oil supplying tip is positioned having holes therein for the passage "of air to assist the atomization. The improvement also includes an improvement in the valve opening to admit the oil to the oil tube in the form of a stream rather than as a film.

In the drawings:

Figure 1 is a vertical section from front to rear through the burner, indicated by line .11 of Fig. 2.

Fig. 2 is a vertical cross section taken on line 2-2 of Fig. 1.

Fig. 3 is a horizontal section on line 33 of Fig. 1 showing the valve construction with the valve stem partly withdrawn.

Fig. 4 is a section on line H of Fig. 1.

Fig.5 is a vertical. section through the valve showing a slight modification.

i Fig. 6 is a detail section of the burner tip.

Fig. 7 shows a slight modification. A casing 10 is'provided at its bottom with a connection for. a compressed air supply 65 pipe 12 and 'at its top with a connection for an oil pipe '13. The forward end of the The object thereof is to obtain better casing is provided with a nozzle 15. An oil pi e 16 extends forward and terminates within the nozzle, being provided on its forward end with a burner ti 18 having a short hollow shank 17 which. is suitably mounted therein as by threading. The extremity of this tip 18 is flared and tapers oif to a knife edge 19. The inclined annular rear wall 20 of the tip has a plurality of apertures 21 therein for the passage of air into the flared portion. A shoulder 22 is provided immediately in the rear of the wall 20 and has a plurality of inclined air passages 23 therein leading into the oil tube 16. The annular face 2 10f the tip beyond inclined wall 20 is parallel with the axis of the tip.

Slidably mounted upon the tube 16 is .a

sleeve 25 having on its forward end a plurality of blades 26 set at a slight'angle to the axis of the sleeve and supporting thereon a hollow truncated cone 27 with its smaller end forward to fit within the nozzle 15. The sleeve is provided with a plurality of annular grooves and: ridges 28 forming a rack 'to cooperate with a pinion 29 for reciprocating the cone 27 within the nozzle. The pin-- ion 29 is mounted upon a shaft 30 extending transversely of the casing and having a manipulating knob 31 on one end thereof.

The knob 31 is provided with a dog 32 which engages a ratchet'33 on the casing to main tain the pinion 29 and sleeve 25 in adjusted position. A compression spring 34 is interposed between the wall of the casing and the pinion 29 to maintain the pinion in position on the rack 28, a sto 35 on the other end of the shaft 30 limiting the movement imparted by the spring .34.

The valve stem 35 controls the flow of oil through the passage 36 in the bottom of the oil chamber 37 into which the oil pipe 13 feeds. The forward end of the passage 36 is reduced as shown so that the oil passing therethrough will ass as a stream instead of as a film. The orward end of the valve stem preferably is cut off at right angles to Patented Oct. 7, 1919.

its axis as in Fig. 1 but may be formed as a tapered needle valve as at 39 in Fig. 5.

In operation of the burner, withdrawal of the valve to uncover the reduced end of passage 36 allows a stream of oil to pass into tube 16 (see Fig. 3), better results being ob tained than where the passage is round and the oil passes as a film since any dirt in the oil will be allowed to pass readily. The

interior of the casing constitutes an air chamber supplied from pipe 12. Rotation of the knob 31 through the medium of pin-- further increased, but the end of the cone passes to the rear of the face 24 of the tip'18 and allows more air to pass between the cone and the tip. The angular blades 26 impart a gyratory motion to the air as it passes, which materially improves atomization of the oil. Passage of air through the angular passages .23 into the oil passage 17 tends to increase the speed of the oil and mixes the air with oil. As the oil leaves the passage 17 it spreads over the wall 20 of the tip and the streams of air entering through apertures 21 catch the oil on edges of the apertures and thoroughly atomize it. The oil that passes to the knife edge 19 is similarly caught up by the air passing around the tip and also atomized.

By this construction perfect atomization is obtained.

The truncated cone 27'may be removed, by first removing the nozzle, retracting the cone, removing the tip 18, and then removing the cone either by rotating the pinion 29 or withdrawing pinion 29 laterally from engagement with rack 28 and slipping off the sleeve 25. By making the tube 16 of the same diameter as the tip 18, the two may be integral as in Fig. 7 and sleeve 25 will pass over the tip.

What I claim is:

1. In a burner, a tip having a flared portion and a hollow fuel connection therefor, the tip having air passages therethrough into the space within the flared portion and the connection having air passages therethrough into the fuel passage.

2. In a burner tip, an outwardly flared portion terminating in a knife edge and having an outer cylindrical face parallel with the axis of the tip, the tip having air passages there'through into the space therewithin the flared portion having greater external diameter than the rest of the tip.

3. In .a burner, the combination with a hollow truncated conical member, of a burner tip within the member, and blades also within said member and secured thereto, and set at an angle to the axis thereof, the hollow member being adjustable axially of the tip.

4. In a burner, a nozzle, an adjustable hollow frusto-conical member, reciprocable ing adjustable axially of the ti 6. In a burner, the combinatlon with an.

oil tube, a burner tip on the outer end thereof, a sleeve reciprocable on the tube, blades on said sleeve set at an angle to the axis of the sleeve, and a frusto-conical member supported by said blades, said member and said tip being adapted for cooperation.

"Z. In a burner, a nozzle, a frusto-conical member reciprocable within said nozzle, a burner tip having a fuel passage therethrough and having an outer cylindrical face of appreciable length at the end thereof to cooperate with said conical member to control an air supply.

8. In a burner, a nozzle, a frusto-conical member reciprocable within said nozzle, a burner tip having a fuel passage therein and a flared outer extremity, said flared extremity having an outer cylindrical face and an annular rear wall, said wall having a plurality of air passages therethrough into the space within said flared extremity.

9. In a burner, a nozzle, a frusto-conical member reciprocable within said nozzle, a burner tip having a flared position and a fuel connection therefor, the connection having inclined air passages therethrough into the fuel passage, said flared portion having an outer cylindrical face and an annular rear wall, said wall having a plurality of air passages therethrough into the space within said flared extremity.

10. In a burner, a nozzle, frusto-conical member reciprocable within the nozzle, a burner tip having a flared portion and a fuel connection therefor, the connection having inclined air passages therethrough into the fuel passage, and a flared portion having inclined air passages therethrough into the space therewithin, the extremity of the flared portion having an outer cylindrical face to cooperate with said frusto-conical member to control the air supply.

11. In a burner, a tip having a flared portion and a fuel connection therefor, the connection having inclined air passages therethrough into the fuel passage, and the flared portion having inclined air passages therethrough into the space within said flared portion.

In testimony whereof I aflix my signature.

GEORGE l/V. LINDSAY. 

